Steam-boiler and furnace



(No Model.) 4 sneet-shet 1.

0.13. oRvIs.

STEAM BOILER AND FURNAGB. No. 535,852.' Patented Mar`.,19,'.1895.

I l A QI S IIII WAV/V 4 Sheet's-Sheet 2. D., ORVIS. STEAM BOILEB. AND FURNAGE.

Patented Mar. 19, 1895.

(No Model.)

`(No Model.) 4 Sheets-Sheet B.

o. D. ORVIS. STEAM BOILBRV AND FURNAGE.

No. 535,852. Patented Mar. 19, 18.95.

.4. t e e S t ,e e h S 4 S. I V R 0 D 0 (No Model.)

STEAM BOILER AND FURNAGE.

Patented Mar.` 19, 1895.

No.V 535,852;

NrrnD dSTATES PATENT OFFICE.

OREL D. ORVIS, OF CHICAGO, ILLINOIS.

STEAM-BOILER AND FU RNACE.

SPECIFICATION forming part of Letters Patent No. 535,852, dated March 19, 1895. Application filed June 11,1894. Serial No. 514,172. (No model.)

To all whom it may concern:

Be it known that I, OREL D. ORVIs, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Steam-Boilers and Furnaces; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

My invention relates to that class of steam boilers and furnaces in which water tubes are used for the purpose of promoting circulation, increasing the heating surfaces and stimulating the generation of steam. Its object is to increase the efficiency of boilers of this class by means of a novel arrangement of parts so as to bring the heated vapors, given off from the fuel, directly and continuously into contact with water surfaces and at the same time to so concentrate the heat immediately after the vapors leave the fire box as to promote the combustion of the gases and to consume the smoke.

The invention consists in the use of a pair of water cylinders located immediately above the burning fuel and near together so that the draft is between them; water tubes connecting these cylinders with the main portion of the boiler and crossing the line of draft; lines through the main portion of the boiler with lateral openings for the induction of the heated vapors and a novel arrangement of partitions and interior walls from the direction of the draft.

It consists in further parts and arrangements of as hereinafter fully set forth.

In the accompanying drawings I show for Figure l a central, longitudinal, vertical section of my steam boiler and furnace. Fig. 2 is a plain section on the line 2-2 Figs. 1 and 3. Fig. 3 is a transverse section on the line 3-3 ofFig. l. Fig. 4 is a similar view on the line 4 4 of Fig. 1. y

In setting the boiler I use an ordinary front wall A, side walls A', A and rear wall A2.

The major portion of the boiler B is substantially the upper half of a cylinder its `lower sides being curved upwardly along its median lines so as to form two depending lobes, and giving the boiler in cross section the general form of a saddle. It extends from the front to the rear of the furnace and has a large flue b longitudinal through each of its lobes.

The grate is shown Vat C and presents no novel features. The means for feeding the furnace being immaterial I have not deemed it necessary to show either the feeding doors or the ash pit doors. The bridge wall, a', is located immediately at the rear of the grates and still farther back is placed a transverse partition, a, of masonry extending to the boiler B and being without apertures save for the accommodation of the several parts of the boiler. A pair of steel cylinders B, B are located above the fire box and are substantially the same length as the boiler B. Each of these cylinders is located near one of the lside walls A and they are spaced apart sufficiently to form a Iiue between them. They are connected with the boiler by means of pipes D, which are set obliquely so that the pipes from one cylinder cross those of the other, both sets entering the boiler B through the arch meeting the two pendent lobes. These pipes D, D are preferably as numerous as they can be placed and extend from the front to the rear ofthe boiler without interruption. From the front wall A to the partition, a, inclined partition dof fire brick extends upwardly from each ofthe cylinders B', B approximately two thirds of the distance to the boiler and rest upon the row of pipes D.

The front ends of the flues b b are closed by the front wall VA, A, of the furnace. The iiues are in communication with the chamber of the furnace above the cylinders B by means of short tubes b extending through the lower sides of the boiler B and through the Walls of the flues h. These tubes b are as numerous as may be necessary to provide sufcient flue area for the free passage of the products of combustion.

The fines b b open at the rear end of the boiler to the furnace chamber. The eduction flue, leading from the furnace to the stack, not shown, is indicated at `X, as passing through the rear wall A2 below the boiler. A horizontal partition or floor E extends for- IOO wardly from the wall A2 to within a short distance of the partition a, so that after being discharged from the flue b the products of combustion move forwardly between the boiler B and the cylinders B' and then pass downwardly to the fille X, there being openings between the door E and the partition a, both between and at the outside of the cylinders B.

Water legs lead from the rear end B to the cylinders B'. The two cylinders B are connected by tubes F which may be as numerous as may be desired and which serve as supports for the forward end of the iioorE which is between the cylinders. I prefer to place upon the top of each of the tubes F forward of the partition a, a fire brick f, as a means of stimulating combustion of the gases.

The space inclosed between the partitions d, d, serves as a combustion chamber, the gases distilled from the burning fuel entering it, passing between the cylinders B' B' and between the tubes F. These gases are discharged from this combustion chamber by passing between the tubes D and circulating around the pendentlobes of the boiler, entering the flues b, b, through the tubes b', and being discharged from their rearward end. The gases circulate among the tubes D which are back of the partition a, and moving forwardly to that wall pass downwardly to the ue X and thence out to the stack.

The forward portions of the cylinders B are exposed directly to the heat radiated from the burning fuel and there is a concentration of the heat between their adjacent surfaces and upon the pipes F connecting them as the gases pass upwardly from the lire box. The combustion of the gases takes place in the chamber inclosed by the partitions d, d, and the heat there developed is concentrated upon the pipes D. The high temperature to which the forward ends of the cylinders B', the tubes connecting them and the pipes leading from the mare subjected secures a very rapid development of steam within these portions of these boilers and the consequent great velocity of circulation, the cooler water being drawn from the rear end of the boiler to the cylinders through the water legs G. The vapors continne to part with their heat as they pass into and through the flues b, and still render eflicient service as they circulate among the tubes D and around the cylinders B' back of the partition a; and the construction is such that they take their entire course while in contact with the boiler and the heat imparted at every step tends to stimulate the circulation of the water.

The natural tendency of the Water within the boiler B is for the cooler portions of it to settle down into the two pendent lobes. Doing so it comes directly into contact with the walls of the fiues b, b.

All of the tubes D, b and F are so disposed that the lineof their distribution is radial as to the curved surface of the boiler and the cylinders which they enter so that they may be secured thereto by the well known and highly efficient method known as expanding.

I claim as my invention,-

1. The combination with a furnace having a fire box,of a boiler forming the arch or roof of the lire'box and being approximately in the form of the upper half of a cylinder with its lower portion curved upward centrally and having longitudinal ilues h, b, through its depending lobes, and flue tubes b', extending laterally from the flues b, b, to the re box, substantially as described.

2. The combination with a fire box, of a boiler, B, forming a roof for the re box, water cylinders, B', B', below the boiler and passing through the re box and being spaced apart to form a flue passage, series of water tubes, D, D, leading from the cylinders to the boiler, and a partition extending upwardly fromJ each of the cylinders outside of the series of water tubes and having flue openings adjacent to the boiler whereby the draft is led from the fire, between the cylinders, among the water tubes to the boiler and spread laterally contiguous to its surface, substantially as and for the purpose set forth.

3. The combination with a furnace of a boiler forming the roof of the furnace and having longitudinal iues, b, h, open at their rearward ends, and flue tubes, b', leading from the furnace chamber through the boiler to the flues b, b, of a pair of water cylinders, B', B', below the boiler and spaced apart to form a draft flue, water tubes connecting the cylinders with the boiler, a solid partition, a, transversely across the furnace, longitudinal partitions, d, d, forward of the partition a, and extending upwardly from the cylinders outside of the water tubes and leaving flue openings above them, an eduction llue through the rear wall of the furnace below the cylinders, and a horizontal partition or oor between the boiler and the eduction flue and a draft opening at the forward end of such floor, substantially as described and for the purpose set forth.

4. The combination with a furnace, of a boiler approximating in form the upper half of a cylinder with its lower surface curved upwardly and having longitudinal flues b, b, through its depending lobes, such iues being open at their rearward ends, and flue tubes, h', leading from the furnace chamber through the boiler to the flues, h, b, a pair of water cylinders, B', B', below the boiler and spaced apart to form a draft Hue, water tubes connecting the cylinders with the boiler, a solid partition, a, transversely across the'furnace,

longitudinal partitions, d, cl, forward of the partition a, and extending upwardly from the cylinders outside of the water tubes and leaving flue openings above them, an eduction flue through the rear wall of the furnace below the cylinders, and a horizontal partition or oor between the boiler and the ICO IIO

eduction fine and a draft opening at the forbrick supported upon the tubes substantially Ward end of such Hoor, substantially `as deas and for the purpose described. 1o scribed and for the purposes set fort-h. In testimony whereof I affix my signature 5. The combination, in a steam boiler and in presence of two Witnesses. 5 furnace, with the grates, of Water cylinders OREL D. ORVIS.

locatedabove the grates and spaced apart to Witnesses: form a draft ue, Water tubes connecting LOUIS K. GILLSON,

the cylinders across such draft Hue, and fire SPENCER WARD. 

